Sponge for substrate cleaning



FIG. 1 is a bottom perspective view of a sponge for substrate cleaningshowing my new design;

FIG. 2 is a top-right perspective view observed from a bottom thereof;

FIG. 3 is a front view thereof, rear, left-side and right-side viewsbeing identical thereto;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is an enlarged, rotated cross-sectional view thereof taken alongsection line 6-6 in FIG. 4.

The cross-hatching pattern shown in FIG. 6 does not represent aparticular material.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

CLAIM The ornamental design for a sponge for substrate cleaning, as shown and described. 